參數(shù)資料
型號(hào): AS4SD1M16S-8A
英文描述: x16 SDRAM
中文描述: x16內(nèi)存
文件頁(yè)數(shù): 31/51頁(yè)
文件大?。?/td> 1071K
代理商: AS4SD1M16S-8A
S DR A M
AS4SD16M16
Austin Semiconductor, Inc.
AS4SD16M16
Rev. 1.5 6/03
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
31
INITIALIZE AND LOAD MODE REGISTER
2
TIMING PARAMETERS
MIN
0.8
MAX
MIN
1.5
MAX
t
AH
ns
t
CKS
ns
t
AS
1.5
ns
t
CMH
0.8
ns
t
CH
2.5
ns
t
CMS
1.5
ns
t
CL
2.5
ns
t
MRD
t
RFC
3
2
t
CK
t
CK(3)
7.5
ns
66
ns
t
CK(2)
10
ns
t
RP
20
ns
t
CKH
0.8
ns
-75
UNITS
-75
SYMBOL*
UNITS
SYMBOL*
*CAS latency indicated in parentheses.
NOTES:
1. The mode register may be loaded prior to the AUTO REFRESH cycles if desired.
2. If CS is HIGH at clock HIGH time, all commands applied are NOP, with CKE a “Don’t Care”.
3. JEDEC and PC100 specify three clocks
4. Outputs are guaranteed High-Z after command is issued.
5. A12 should be a LOW at t
P
+ 1.
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